Join Date: Sep 1999
Location: Southeast Iowa
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Re: Heater hose routing on cj7 with chevy 350 swap out
As the blowhards in Washington are often heard to say: "SENATOR, I'M GLAD YOU ASKED ME THAT!" Does that crate moror have a fitting on the front end of the intake manifold right next to the thermostat housing? If it does, THAT is where one of the heater hoses will go. The circuit is from that fitting to the heater and then back to the top hole on the water pump. Now if you want to customize this setup and make it WORK, both summer and winter, you need to do the CJDave mod as used on nine....count them, NINE....of his Chev-Lay and GMC peekups: The heater return hose has a "TEE" in it, and the side leg of the tee goes to the heater hose fitting that usually sticks out of the top tank of the radiator on the RH side on the Chev-Lay pickups, the main run of the tee just continues on to the water pump fitting as it normally would. Then, you put a restrictor in the side leg of that tee, A 12 Ga. shotgun slug pusher washer is the perfect size, so go get a deer slug and peel it. This setup does two things: (1) it helps the engine "burp" the air out and as a result, the cooling system fills better cold and the radiator runs completely full all the time, which is why you BOUGHT the radiator. and (2) the restrictor keeps the system from pushing all of the hot water into the radiator on cold days like the early Shiv-Lays did. THEN, drill a hole the size of a pencil lead in that thermostat. Drill it in the flat area. If you do not have a fitting in the tank of that radiator, PUT ONE IN.